MyBatis常用操作

// 1、批量新增
// 返回自增id(useGeneratedKeys="true" keyProperty="id")
<insert id="saveBatch" parameterType="java.util.List"  useGeneratedKeys="true" keyProperty="id">
    insert into sys_user
    (
    user_name,
    sex
    )
    values
    <foreach collection="list" item="item" index="index" separator=",">
        (
        #{item.userName},
        #{item.sex}
        )
    </foreach>
</insert>
 <insert id="updateBatch" parameterType="java.util.List">
        <foreach collection="list" item="item" separator=";">
            update sys_user
            <set>
                <if test="item.userName!=null and item.userName!=''">
                    user_name = #{item.userName},
                </if>
                <if test="item.sex!=null">
                    user_age = #{item.sex},
                </if>
            </set>
            where user_id = #{item.userId}
        </foreach>
    </insert >

// 2、批量修改
 <update id="updateBatch" parameterType="java.util.List">
        <foreach collection="list" item="item" separator=";">
            update sys_user
            <set>
                <if test="item.userName!=null and item.userName!=''">
                    user_name = #{item.userName},
                </if>
                <if test="item.sex!=null">
                    sex= #{item.sex},
                </if>
            </set>
            where user_id = #{item.userId}
        </foreach>
    </update>

//3、批量删除
<delete id="deleteByLogic"  parameterType = "java.util.List">
     delete from sys_user where id in
      <foreach collection="list"  item="item" open="(" separator="," close=")"  >
       #{item}
      </foreach>
</delete>